feat(contacts): имена из телефонной книги везде + тумблер в дев-меню

lib/core/contacts/device_contacts_service.dart

@@ -0,0 +1,82 @@
+import 'dart:io';
+
+import 'package:flutter_contacts/flutter_contacts.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+import '../config/app_phonebook_names.dart';
+
+class DeviceContactsService {
+  DeviceContactsService._();
+
+  static const _grantedKey = 'phonebook_granted';
+
+  static final Map<String, String> _byLast10 = {};
+  static bool _loaded = false;
+
+  static bool get _supported => Platform.isAndroid || Platform.isIOS;
+
+  static String? _last10(String raw) {
+    final digits = raw.replaceAll(RegExp(r'[^\d]'), '');
+    if (digits.length < 10) return null;
+    return digits.substring(digits.length - 10);
+  }
+
+  static String? nameForPhone(int phone) {
+    if (!AppPhonebookNames.current.value) return null;
+    if (_byLast10.isEmpty) return null;
+    final key = _last10(phone.toString());
+    if (key == null) return null;
+    final name = _byLast10[key];
+    if (name == null || name.trim().isEmpty) return null;
+    return name.trim();
+  }
+
+  static Future<void> loadFromStartup() async {
+    if (_loaded || !_supported) return;
+    if (!AppPhonebookNames.current.value) return;
+    final prefs = await SharedPreferences.getInstance();
+    if (prefs.getBool(_grantedKey) != true) return;
+    final granted = await FlutterContacts.requestPermission(readonly: true);
+    if (!granted) return;
+    await _readBook();
+  }
+
+  static Future<bool> ensureLoadedInteractive() async {
+    if (_loaded || !_supported) return false;
+    if (!AppPhonebookNames.current.value) return false;
+    final granted = await FlutterContacts.requestPermission(readonly: true);
+    if (!granted) return false;
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setBool(_grantedKey, true);
+    return _readBook();
+  }
+
+  static Future<bool> reload() async {
+    _loaded = false;
+    _byLast10.clear();
+    return ensureLoadedInteractive();
+  }
+
+  static Future<bool> _readBook() async {
+    try {
+      final contacts = await FlutterContacts.getContacts(
+        withProperties: true,
+      );
+      _byLast10.clear();
+      for (final contact in contacts) {
+        final name = contact.displayName.trim();
+        if (name.isEmpty) continue;
+        for (final phone in contact.phones) {
+          final key = _last10(phone.number);
+          if (key != null) {
+            _byLast10.putIfAbsent(key, () => name);
+          }
+        }
+      }
+      _loaded = true;
+      return _byLast10.isNotEmpty;
+    } catch (_) {
+      return false;
+    }
+  }
+}